JP2001248458A - Internal combustion engine device and air conditioner having the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an internal combustion engine device with less damage to a start mechanism part by shortening a time required for starting an internal combustion engine. SOLUTION: An internal combustion engine 50 is formed so that a time for starting thereof can be shortened by starting with a throttle valve 10 opened at a proper angle. The initial opening of the throttle valve 10 at the time of starting is determined by a statistical calculation processing, by a control part 70, of a time from the start to the end of operation of the engine.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal combustion engine apparatus provided with an arithmetic function part for calculating an optimum opening degree (opening degree) of a throttle valve when the internal combustion engine is started, and an air conditioner using the same. It is.

[0002]

2. Description of the Related Art Many types of internal combustion engines of this type are used as driving sources in automobiles, engine-driven air conditioners, and the like, and are well known. For example, as shown in FIG. 6, the opening degree of the throttle valve 10 is determined by a detection signal that detects the state of each part of the internal combustion engine 50 and a detection signal that detects the degree of operation of the accelerator pedal 7 operated by the driver. An internal combustion engine device 100 having a configuration for performing calculation is disclosed in Japanese Patent Application Laid-Open No. 6-42391.

In FIG. 6, a throttle valve 10 provided in an intake passage 2 of an internal combustion engine 50 variably adjusts a flow rate of air taken in from an air filter 3 and directed to a cylinder side, so that a throttle valve 10 from a fuel tank 5 is provided. The purpose is to variably adjust the mixing ratio of the fuel and the fuel gas injected from the fuel injection valve 5A to optimize the operation efficiency of the internal combustion engine 50.

An electric pulse from a distributor 15 is applied to a spark plug 16 to a mixed gas of air and fuel gas sent into a cylinder to cause a spark discharge, thereby causing a combustion cycle to be performed.

The throttle valve 10 variably adjusts the mixing ratio by varying the angle θ from the closed position S by a driving source such as a pulse motor 10A. The degree (opening) is detected by obtaining an opening detection signal D1 by the angle detector 10B. The operation amount of the accelerator pedal 7 is detected by the operation amount detection signal D2 of the angle detector 7A.
The rotation speed (the number of rotations per unit time) of the crankshaft 20 is determined by the rotation speed detection signal D3 of the tachometer 25 in the intake passage 2.
The temperature of the wall and the intake pressure are respectively indicated by the temperature detector 8
A, a temperature detection signal D4 of the pressure detector 8B, and a pressure detection signal D5, and by giving each of these detection signals and each operation signal to an electronic control unit (ECU) 70, The microcomputer determines the optimal opening θ of the throttle valve.

At the time of starting, a drive power is supplied to a starting mechanism 60 (starter) by an electric motor to rotate the crankshaft 20 to perform a combustion cycle, and to increase a mechanical kinetic inertia to a rotation speed at which the combustion cycle can be continued. It is necessary to force operation by external force. When the rotational speed at which the combustion cycle can be sustained due to the increase in the mechanical kinetic inertia is reached, a "complete explosion" is called.

[0007] The time required from the start of the start by the start mechanism 60 to the completion of the start to reach the rotation speed at which the combustion cycle can be sustained by the mechanical inertia can be referred to as the start required time. The required start time and the success / failure of the start are related to the magnitude of the opening θ of the throttle valve, and it is desirable to set the opening to an optimum degree.

[0008]

Since the optimum opening of the throttle valve at the time of startup depends on various conditions such as the friction of each part of the internal combustion engine itself and the temperature of the outside air, the optimum opening is determined by the above-described method. Since it is difficult to control the throttle valve by calculation based on each detection signal according to the related art, the opening is controlled to start from an opening that always succeeds and gradually increase the opening.

[0009] For this reason, since the time required for starting is relatively long, there is a disadvantage that the starting mechanism portion is greatly consumed and the life of the entire internal combustion engine device is shortened. Therefore, it is desired to provide an internal combustion engine device that can be started by obtaining the optimum opening of the throttle valve by calculation without such disadvantages.

[0010]

According to one aspect of the present invention, there is provided an internal combustion engine having an arithmetic function portion for calculating an optimum opening of a throttle valve when the internal combustion engine is started. An internal combustion engine device comprising a throttle opening determining means for determining an optimum opening value of the throttle valve at the time of starting based on statistical data of a time from the start of starting to the completion of starting. If the startup fails or the time until startup is longer than the predetermined time, the throttle valve opening at the next startup is changed more than the predetermined opening, and the throttle valve opening within the predetermined startup time is specified. It has a function to learn from the opening.

According to a second aspect of the present invention, there is provided a refrigeration cycle having an internal combustion engine device, wherein a compressor driven by the internal combustion engine device, an outdoor heat exchanger, and an indoor heat exchanger are connected by refrigerant piping. In the air conditioner having the above structure, the internal combustion engine device determines an optimal throttle valve opening value at the time of startup based on statistical data of the time from the start of startup to the completion of startup at the time of startup of the internal combustion engine. If the start-up fails or the time until the start-up is longer than a predetermined time, the determining means greatly changes the throttle valve opening at the next start-up, and learns the throttle valve opening within the predetermined start-up time. It has a function to do.

The invention described in claim 3 is the first and second inventions.
The throttle opening determining means of the internal combustion engine device described in
If the startup time is within a predetermined time, the next throttle opening is changed back and forth with the throttle opening at that time as the center, and the throttle opening with the shortest startup time is taken as the next throttle opening. It has a function to do.

The invention described in claim 4 is the first and second inventions.
The throttle opening determining means of the internal combustion engine device described in
It has a function that always uses the throttle opening with the shortest startup time as the next throttle opening.

The invention described in claim 5 is the first and second aspects of the present invention.
The throttle opening determining means of the internal combustion engine device described in
The minimum throttle opening and the maximum throttle opening are determined in advance.

As described above, the internal combustion engine of the present invention according to the first to fifth aspects of the present invention performs the calculation based on the statistical data of the time from the start of the start to the completion of the start (start required time).
Since the configuration is such that the optimum value of the throttle valve opening at the time of startup is determined, the optimum startup can always be performed irrespective of the aging of each operating portion of the device.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 5 is a diagram showing the configuration of an engine-driven air conditioner using the internal combustion engine of the present invention.

The internal combustion engine of the present invention has the same configuration as the internal combustion engine 100 of FIG.
The ECU 70 determines an optimal opening of the throttle valve 10 at the time of startup as described later.

In FIG. 5, U1 is an outdoor unit, U2
Indicates each indoor unit.

A plurality of indoor units U2 are arranged according to the size of the room and the air-conditioning load of the room. The plurality of indoor units U2 and the outdoor unit U1 are connected by a refrigerant pipe 101.

The outdoor unit U1 includes a compressor 132, an internal combustion engine 100, a four-way valve 133, an outdoor heat exchanger 13
4, a receiver tank 135, an accumulator 138, an outdoor electric valve 139, and the like are incorporated.

The indoor unit U2 includes an indoor electric valve 13
6. The indoor heat exchanger 137 and the like are built in.

These refrigeration equipments are connected by a refrigerant pipe to form a refrigeration cycle, and the compressor 132 is driven by the operation of the internal combustion engine 100. During cooling, the four-way valve 133 is set as shown by a solid line and the refrigerant is supplied by a solid arrow. And the indoor heat exchanger 137 is operated as an evaporator to cool the room. On the other hand, at the time of heating, the four-way valve 133 is set as shown by a broken line, the refrigerant flows as shown by a broken line arrow, and the indoor heat exchanger 137 acts as a condenser to heat the room. In addition, 140, 1
41 is a bypass valve, which is a refrigerant discharge side pipe 1 of the compressor 122.
42 and the refrigerant suction side pipe 143 are connected to be able to communicate with each other.

Reference numeral 144 denotes a liquid pipe, which opens and closes a liquid valve 145 provided on the way, so that a part of the liquid refrigerant flowing through the refrigerant pipe between the service valve 146 and the receiver tank 135 is removed before the accumulator 138. It can be supplied to the refrigerant suction pipe 133 as appropriate.

FIG. 1 is a block diagram showing the configuration of the internal combustion engine device 100. As shown in FIG.
A control unit mainly composed of the PU 70A, for example, a commercially available C
It is a PU board. Note that the ECU 70 can be configured to control the entire air conditioner.

Each detection signal obtained by detecting the state of each required part, and operation signals such as operation / stop inputted by operating the operation unit 76 are transmitted to the working memory 73 via the input / output port 71. Captured and stored. As the detection signal,
For example, there is a rotation speed detection signal D3 or the like in which the rotation speed of the crankshaft 20 is detected by the tachometer 25. The display unit 77
A required state among the states of the control processing in the CPU 70A and the like, for example, a warning of startup failure and a previous value of the opening degree of the throttle valve are displayed.

The processing memory 72 is, for example, a ROM.
The control processing program is stored. Working memory 7
Reference numeral 3 denotes, for example, a RAM, which temporarily stores data calculated by the CPU 70A. The data memory 74 is, for example, an electrically rewritable PROM (EEPROM (Electricall
y Erasable PROM)), which is the initial value and
Predetermined value / quantitative value data is stored in advance, and data obtained during the start-up operation is stored each time.

The CPU 70A executes the control processing program stored in the processing memory 72, and stores the data stored in the working memory 73 and the data memory 74 and the clock circuit 7
Control signals obtained by processing the timed data and the like by the control unit 5, for example, control signals for controlling the throttle valve 10, the distributor 15, and the like, are output to required control target parts via the input / output port 71 and controlled. Perform processing.

The operation of the internal combustion engine configured as described above will be described with reference to the flowcharts of FIGS.

The control processing flow shown in FIGS. 3 and 4 is a subroutine for performing "control processing of throttle valve opening at start-up" attached to a control main routine for controlling the overall operation of internal combustion engine apparatus 100. When the internal combustion engine 50 is started, for example, when the power is turned on,
This subroutine is executed.

As the control flow, when the control is started, it is confirmed whether the internal combustion engine 50 is stopped (step S).
1) Further, the throttle valve 10 is operated in the closing direction to define the reference position S of the throttle valve 10, and the completely closed position is defined as the opening degree "0" (step S2). The value of the opening degree of the throttle valve 10 in the subsequent control processing is a value from the specified position. When the reference position is defined, the start signal is confirmed, and the operation start processing of step S3 and subsequent steps is executed.

First, the opening of the throttle valve 10 is set to an initial set value A (a predetermined value) (step S3), and the starter is turned on (step S4).

The "start operation" command signal may be a signal input by the driver operating the operation unit 76 or a request signal accompanying the operation on the load side. A signal output based on the result of comparison between the detected value of the temperature detector and the set temperature value is the command signal for "start operation".

When a command signal for "starting operation" of the internal combustion engine 50 is received, the measurement of the cranking time (start time) is started (step S5), and 1 is added to the counter and replaced with the value of the counter (step S6). Next, it is determined whether the rotation speed is less than 700 rotations (step S7).
If the rotation speed is less than 700 rotations, the process is repeated until the cranking time becomes 5 seconds or longer (step S8), and 10 is added to the throttle opening A to replace the value with the throttle opening A (step S9). Subsequently, the counter is set to 0 (step S10), and the throttle opening A is set to 130.
It is determined whether it is less than or equal to (Step S11). If the counter is 15 or more, a start failure occurs (Step S19),
If the counter is less than 15, the process returns to step S3 and repeats the process (step S12). If the throttle opening A is smaller than 130, the process returns to step S1. If the throttle opening A is larger than 130, the process returns to step S20 in FIG.
Step 70 sets the throttle opening A to 70.
Proceed to 2.

If the rotation speed is 700 rotations or more in step S7, the cranking time is set to t (step S7).
13), the counter is set to 0 (step S14), it is determined whether or not t is 3 seconds or more (step S15), and 10 is added to the throttle opening A and replaced with the value of the throttle opening A (step S16). Subsequently, the counter is set to 0 (step S17), and the throttle opening A is set to 130.
It is determined whether it is equal to or less than (Step S18). If the throttle opening A is 130 or less, the process returns to Step S1, and if the throttle opening A is larger than 130, Step S2 in FIG.
Jump to 0 and set the throttle opening A to 70, then set step S
Return to 1.

If the cranking time t is less than 3 seconds in step S15, the process jumps to step S21 of the subroutine shown in FIG. 4, where 1 is added to the counter and replaced with the value of the counter (step S21). If it is larger than 2, t is set to t3 (step S3).
24). If the counter is 1 or less, t is set to t1 (step S27), 10 is added to the throttle opening A, and the value is replaced with the value of the throttle opening A (step S2).
8). (Steps S22 to S23) When t3 is set to t in step S24, the counter is set to 0 (step S25), and the throttle opening A is set to the throttle opening at the smallest value of t1 to t3. Replace with throttle opening A (step S
26).

As described above, the operation start control is executed every time the internal combustion engine 50 is started, and the opening of the throttle valve having a high "successful start-up success rate" obtained by the past start-up operation and considered to be statistically optimal. The value of the degree “A” is stored in the data memory 74 as a new initial value “A”, and this data will be used at the next startup.

Therefore, in this case, although the accuracy is somewhat low in the statistically optimum degree, the optimum opening degree of the throttle valve 10 at the next start can be easily set in a short time. Will be.

As described above, the present invention has been described based on the above embodiment, but the present invention is not limited to this.

[0040]

As described above, the internal combustion engine apparatus according to the present invention calculates the optimum throttle valve opening degree at the time of startup by calculating based on the statistical data of the time from the start of startup to the completion of startup (required startup time). Since the configuration is such that the value is determined, an optimal start-up can always be performed irrespective of aging of each operation part of the apparatus.

In order to calculate such an optimal opening of the throttle valve, since the calculation is performed by simple data such as detection data of the crankshaft rotation speed / throttle valve opening and time measurement data of a clock circuit, there are many configurations. The structure for detecting the operation state of each unit of the device is unnecessary and can be configured at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram of the present invention in which a load portion is omitted.

FIG. 2 is a block diagram of a main part of the present invention.

FIG. 3 is a flowchart of a main part control process of the present invention.

FIG. 4 is a flowchart of a main part control process of the present invention.

FIG. 5 is a block diagram of an engine-driven air conditioner using the internal combustion engine of the present invention.

FIG. 6 is a perspective view of a main part of the internal combustion engine device, omitting a load portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Throttle valve 20 Crankshaft 50 Internal combustion engine 60 Starting mechanism (starter) 70 Electronic control unit (ECU) 100 Internal combustion engine device 132 Compressor 134 Outdoor heat exchanger 136 Indoor heat exchanger

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F02D 41/06 310 F02D 41/06 310 45/00 340 45/00 340F F-term (Reference) 3G065 CA00 CA22 DA04 EA01 GA00 GA10 GA41 JA15 KA02 3G084 BA05 CA01 DA09 EB20 FA36 3G093 AA01 AA12 BA15 CA01 DA12 EA09 FA09 3G301 HA01 JA03 KA01 LA01 MA14 ND30 PA11Z

Claims (5)

[Claims] An internal combustion engine device provided with a calculation function portion for calculating an optimum opening degree of a throttle valve at the time of startup of an internal combustion engine, wherein the internal combustion engine device has a startup function based on statistical data of a time from the start of startup to the completion of startup. In an internal combustion engine device provided with a throttle opening determining means for determining an optimal value of the opening of the throttle valve in (1), if this unit fails to start or the time until the starting is longer than a predetermined time, Change the opening of the throttle valve at startup to a value larger than the predetermined opening,
An internal combustion engine device having a function of learning a throttle valve opening within a predetermined startup time from a predetermined opening. 2. An air conditioner having an internal combustion engine device, wherein a compressor driven by the internal combustion engine device, an outdoor heat exchanger, and an indoor heat exchanger are connected by a refrigerant pipe to form a refrigeration cycle. The internal combustion engine apparatus includes a throttle opening degree determining unit that determines an optimal value of the opening degree of the throttle valve at the time of starting based on statistical data of the time from the start of starting the internal combustion engine to the completion of the starting. Alternatively, when the time until the start is longer than a predetermined time, the throttle valve opening at the next start is largely changed, and a function of learning the throttle valve opening within the predetermined start time is provided. A characteristic air conditioner. 3. The throttle opening determining means for an internal combustion engine device according to claim 1 or 2, wherein when the starting time is within a predetermined time, the throttle opening of the next time is centered on the throttle opening at that time. An internal combustion engine apparatus having a function of changing the throttle opening degree having the shortest start time among the throttle opening degrees to the next throttle opening degree. 4. The throttle opening determining means for an internal combustion engine according to claim 1 or 2, wherein the throttle opening having the shortest start time is always used as the next throttle opening. Internal combustion engine device. 5. The internal combustion engine apparatus according to claim 1, wherein the throttle opening degree determining means for the internal combustion engine apparatus determines a minimum throttle opening degree and a maximum throttle opening degree at startup. .